406557 has 12 divisors (see below), whose sum is σ = 592800. Its totient is φ = 268488.

The previous prime is 406547. The next prime is 406559. The reversal of 406557 is 755604.

406557 is a `hidden beast` number, since 4 + 0 + 655 + 7 = 666.

It is not a de Polignac number, because 406557 - 2¹⁸ = 144413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406557.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406557.

It is not an unprimeable number, because it can be changed into a prime (406559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1678 + ... + 1904.

It is an arithmetic number, because the mean of its divisors is an integer number (49400).

2⁴⁰⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

406557 is a deficient number, since it is larger than the sum of its proper divisors (186243).

406557 is a wasteful number, since it uses less digits than its factorization.

406557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 406557 is about 637.6182243318. The cubic root of 406557 is about 74.0810531418.

The spelling of 406557 in words is "four hundred six thousand, five hundred fifty-seven".